🔥Fiora's old ultimate, Blade Waltz, was a dash ability with an insanely high AD ratio that dealt massive damage.
⚡️Aatrox's Blood Well allowed him to revive and restore health if he died, making him almost impossible to kill.
💫Aurelion Sol's Center of the Universe, while a creative ability, had limited range and couldn't effectively hit mobile champions.
🙌Quinn's Tag Team ultimate allowed her bird, Valor, to transform into a melee attacker, but it didn't significantly impact her gameplay.
🦅Gangplank's Raise Morale gave him bonus AD and movement speed, but the unique activation cost of sacrificing an ally minion made it problematic.